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Finding the Fourth Proportional to 7,207.79, 9,955.58 and 5,215.19

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Solution

The fourth proportional to 7,207.79, 9,955.58 and 5,215.19 is: 7,203.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,207.79 : 9,955.58 = 5,215.19 : x
  2. Step 2: Convert to fraction form
    7,207.79/9,955.58 = 5,215.19/x
  3. Step 3: Cross multiply
    7,207.79x = 9,955.58 × 5,215.19
  4. Step 4: Simplify right side
    7,207.79x = 51,920,165.41
  5. Step 5: Solve for x
    x = 51,920,165.41/7,207.79
  6. Step 6: Final answer
    x = 7,203.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.